On Thu, 14 Feb 2008 01:39:59 GMT, Ecnerwal
wrote:

In article ,
Larry Jaques wrote:

If they're dual-capped barrels, perhaps you could pressurize the small
hole with air and pipe the large outlet for a quick and dirty emptying
for a lot less cost than pumps.

Good, but be sure to use a regulator and keep the pressure reasonable so
you don't ruin the drums. Might even work with an open end barrel if you
have a good sealing clamp-on top.

Figure 3 psi max. Makes for really slow pumping of thick oils
(BTDT).